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Virtualization

ID	Contact Title	Contact Name	Country	Rating


1	Owner	Georg Pipps	Austria	1 2 3 4 5
2	Sales Associate	Howard Snyder	France	1 2 3 4 5
3	Sales Manager	Howard Snyder	France	1 2 3 4 5
4	Sales Associate	Patricio Simpson	Brazil	1 2 3 4 5
5	Sales Representative	Hanna Moos	Austria	1 2 3 4 5
6	Accounting Manager	Howard Snyder	England	1 2 3 4 5
7	Marketing Manager	Hanna Moos	Brazil	1 2 3 4 5
8	Sales Associate	Paul Henriot	England	1 2 3 4 5
9	Sales Consultant	Jaime Yorres	Austria	1 2 3 4 5
10	Sales Agent	Georg Pipps	Brazil	1 2 3 4 5
11	Owner	Antonio Moreno	England	1 2 3 4 5
12	Sales Agent	Elizabeth Lincoln	Germany	1 2 3 4 5
13	Sales Manager	Elizabeth Lincoln	France	1 2 3 4 5
14	Sales Agent	Paul Henriot	Italy	1 2 3 4 5
15	Sales Associate	Antonio Moreno	Spain	1 2 3 4 5
16	Sales Agent	Pascale Cartrain	Brazil	1 2 3 4 5
17	Sales Consultant	Howard Snyder	USA	1 2 3 4 5
18	Accounting Manager	Patricio Simpson	Austria	1 2 3 4 5
19	Marketing Assistant	Howard Snyder	Brazil	1 2 3 4 5
20	Sales Representative	Patricio Simpson	Brazil	1 2 3 4 5
21	Sales Consultant	Matti Karttunen	Germany	1 2 3 4 5
22	Owner	Hanna Moos	Germany	1 2 3 4 5
23	Sales Representative	Antonio Moreno	England	1 2 3 4 5
24	Accountant	Matti Karttunen	Spain	1 2 3 4 5
25	Sales Agent	Patricio Simpson	Italy	1 2 3 4 5
26	Sales Agent	Pascale Cartrain	Argentina	1 2 3 4 5
27	Sales Agent	Paul Henriot	Spain	1 2 3 4 5
28	Sales Representative	Paul Henriot	Italy	1 2 3 4 5
29	Sales Manager	Paul Henriot	Spain	1 2 3 4 5
30	Owner	Pascale Cartrain	France	1 2 3 4 5
31	Marketing Manager	Matti Karttunen	Austria	1 2 3 4 5
32	Sales Agent	Hanna Moos	USA	1 2 3 4 5
33	Accountant	Elizabeth Lincoln	France	1 2 3 4 5
34	Sales Manager	Paul Henriot	Spain	1 2 3 4 5
35	Marketing Manager	Howard Snyder	USA	1 2 3 4 5
36	Marketing Manager	Jaime Yorres	Bulgaria	1 2 3 4 5
37	Sales Representative	Pascale Cartrain	Argentina	1 2 3 4 5
38	Sales Agent	Howard Snyder	Italy	1 2 3 4 5
39	Accountant	Antonio Moreno	England	1 2 3 4 5
40	Sales Agent	Antonio Moreno	USA	1 2 3 4 5
41	Marketing Manager	Antonio Moreno	France	1 2 3 4 5
42	Marketing Assistant	Jaime Yorres	Austria	1 2 3 4 5
43	Sales Agent	Howard Snyder	France	1 2 3 4 5
44	Accountant	Elizabeth Lincoln	Argentina	1 2 3 4 5
45	Owner	Georg Pipps	Bulgaria	1 2 3 4 5
46	Sales Representative	Patricio Simpson	Spain	1 2 3 4 5
47	Sales Representative	Paul Henriot	Bulgaria	1 2 3 4 5
48	Sales Representative	Matti Karttunen	Germany	1 2 3 4 5
49	Owner	Howard Snyder	Austria	1 2 3 4 5
50	Sales Manager	Elizabeth Lincoln	Germany	1 2 3 4 5
51	Owner	Antonio Moreno	Italy	1 2 3 4 5
52	Sales Agent	Howard Snyder	England	1 2 3 4 5
53	Accounting Manager	Georg Pipps	Spain	1 2 3 4 5
54	Sales Agent	Matti Karttunen	England	1 2 3 4 5
55	Accountant	Howard Snyder	Austria	1 2 3 4 5
56	Accountant	Antonio Moreno	Austria	1 2 3 4 5
57	Sales Consultant	Hanna Moos	England	1 2 3 4 5
58	Marketing Assistant	Patricio Simpson	France	1 2 3 4 5
59	Marketing Manager	Howard Snyder	Brazil	1 2 3 4 5
60	Sales Associate	Pascale Cartrain	Brazil	1 2 3 4 5
61	Marketing Assistant	Patricio Simpson	Italy	1 2 3 4 5
62	Sales Representative	Paul Henriot	England	1 2 3 4 5
63	Sales Representative	Antonio Moreno	Italy	1 2 3 4 5
64	Sales Representative	Elizabeth Lincoln	Spain	1 2 3 4 5
65	Sales Manager	Hanna Moos	England	1 2 3 4 5
66	Sales Consultant	Hanna Moos	France	1 2 3 4 5
67	Sales Manager	Pascale Cartrain	Spain	1 2 3 4 5
68	Sales Representative	Georg Pipps	Spain	1 2 3 4 5
69	Accountant	Hanna Moos	Austria	1 2 3 4 5
70	Owner	Howard Snyder	USA	1 2 3 4 5
71	Accounting Manager	Howard Snyder	Spain	1 2 3 4 5
72	Accounting Manager	Jaime Yorres	Germany	1 2 3 4 5
73	Marketing Manager	Howard Snyder	Brazil	1 2 3 4 5
74	Sales Manager	Elizabeth Lincoln	USA	1 2 3 4 5
75	Sales Associate	Hanna Moos	Bulgaria	1 2 3 4 5
76	Owner	Pascale Cartrain	France	1 2 3 4 5
77	Sales Representative	Hanna Moos	Austria	1 2 3 4 5
78	Sales Manager	Hanna Moos	Germany	1 2 3 4 5
79	Sales Representative	Elizabeth Lincoln	Spain	1 2 3 4 5
80	Sales Representative	Georg Pipps	Brazil	1 2 3 4 5
81	Accountant	Patricio Simpson	Bulgaria	1 2 3 4 5
82	Sales Agent	Hanna Moos	England	1 2 3 4 5
83	Owner	Jaime Yorres	Bulgaria	1 2 3 4 5
84	Marketing Assistant	Jaime Yorres	Austria	1 2 3 4 5
85	Accountant	Georg Pipps	England	1 2 3 4 5
86	Sales Agent	Howard Snyder	Italy	1 2 3 4 5
87	Accountant	Pascale Cartrain	Argentina	1 2 3 4 5
88	Accounting Manager	Jaime Yorres	Brazil	1 2 3 4 5
89	Marketing Manager	Paul Henriot	Argentina	1 2 3 4 5
90	Sales Consultant	Howard Snyder	Spain	1 2 3 4 5
91	Sales Agent	Pascale Cartrain	France	1 2 3 4 5
92	Accounting Manager	Jaime Yorres	France	1 2 3 4 5
93	Sales Manager	Matti Karttunen	Germany	1 2 3 4 5
94	Accounting Manager	Jaime Yorres	USA	1 2 3 4 5
95	Sales Associate	Jaime Yorres	Austria	1 2 3 4 5
96	Sales Manager	Hanna Moos	Brazil	1 2 3 4 5
97	Accountant	Howard Snyder	Austria	1 2 3 4 5
98	Sales Representative	Antonio Moreno	Bulgaria	1 2 3 4 5
99	Accountant	Hanna Moos	Austria	1 2 3 4 5
100	Sales Associate	Antonio Moreno	Bulgaria	1 2 3 4 5


...71 72 73 74 75 76 77 78 79 80 ... Item 79001 to 80000 of 300000 Page: of 300 GoPage size:

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Columns
- ID
- Contact Title
- Contact Name
- Country
- Rating

About this demo
C#
VB
Download demo code files
Isolate this demo as a stand-alone application

RadGrid's virtualization feature allows you to handle hundreds of thousands of rows without negatively impacting the user experience. The control achieves this thanks to its ItemsPerView property allowing you to control the number of items loaded at a time. Users can now scroll, as well as show, hide, resize and reorder columns without any waiting time.

This demo shows how quickly Telerik's ASP.NET DataGrid can handle user interactions with 300,000 items. You can configure the component to allow scrolling through the entire data set or only through the current page by using EnableCurrentPageScrollOnly property,.

<%@ Page Language="vb" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="Telerik.GridExamplesVBNET.Performance.Virtualization.DefaultVB" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link href="styles.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1"></telerik:RadAjaxLoadingPanel>
    <telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel" LoadingPanelID="RadAjaxLoadingPanel1" CssClass="demo-container">
        <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server"  AutoGenerateColumns="false"
            AllowSorting="true" GroupingEnabled="false"
            EnableHeaderContextMenu="true" AllowPaging="true" PageSize="1000" OnNeedDataSource="RadGrid1_NeedDataSource">
            <MasterTableView TableLayout="Fixed">
                <Columns>
                    <telerik:GridBoundColumn UniqueName="ID" HeaderText="ID" HeaderStyle-Width="50px" DataField="ID"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactTitle" HeaderText="Contact Title" HeaderStyle-Width="150px" DataField="ContactTitle"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactName" HeaderText="Contact Name" HeaderStyle-Width="150" DataField="ContactName"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="Country" HeaderText="Country" HeaderStyle-Width="100px" DataField="Country"></telerik:GridBoundColumn>
                    <telerik:GridRatingColumn UniqueName="Rating" HeaderText="Rating" HeaderStyle-Width="100px" DataField="Rating"></telerik:GridRatingColumn>
                </Columns>
            </MasterTableView>
            <ClientSettings ReorderColumnsOnClient="true" AllowColumnsReorder="true" ColumnsReorderMethod="Reorder">
                <Virtualization EnableVirtualization="true" InitiallyCachedItemsCount="2000"
                    LoadingPanelID="RadAjaxLoadingPanel1" ItemsPerView="100"/>
                <Scrolling AllowScroll="true" UseStaticHeaders="true" ScrollHeight="500px" />
                <Resizing AllowColumnResize="true" />
            </ClientSettings>
            <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
        </telerik:RadGrid>
    </telerik:RadAjaxPanel>
    </form>
</body>
</html>

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